A group of young offenders come to stay at Ashfordly Hall, but soon find themselves under suspicion after a spate of disturbances in the village. Meanwhile, Blaketon and Ventress go on the hunt for a spinster's missing dog, and a £50 reward gives Peggy an idea.

Blaketon spots local coal merchant Arthur Bolton sharing a kiss with another woman and quickly gives the man's wife the bad news. However, the cheat is found murdered the next day and the former policeman becomes the prime suspect, leaving PC Walker to lead an investigation to clear his name. Peggy fails to back a winner when she buys a greyhound that refuses to run.